The flaws put users at risk of malware infection via a maliciously crafted website and from denial-of-service attacks.

It is currently not known whether the vulnerabilities have been exploited by hackers, and at the time of publishing Apple had not responded to The INQUIRER's request for comment.

Apple has a policy of not discussing security issues, stating, "For the protection of our customers, Apple does not disclose, discuss, or confirm security issues until a full investigation has occurred and any necessary patches or releases are available."

"Apple has released updates for Safari to address multiple vulnerabilities, some of which could allow a remote attacker to execute arbitrary code or cause a denial of service. Users and administrators are encouraged to review Apple Security Update HT6254 and apply the necessary updates," read the US CERT's statement.